the messages from general john allen and jill kelley were discovered in the f.b.i. investigation of petraeus last year. it's been more than four months since the deadly terror attack on the u.s. diplomatic facilities in benghazi, libya. tomorrow, america's top diplomats will finally answer questions about what happened or should we ask them. one of them. where are the dozens of survivors of that attack? why haven't we heard from them? national security correspondent jennifer griffin reports tonight from the state department. >> ambassador steven's body was missing for nearly 11 hours. u.s. military assets in europe were alerted but never utilized. yet, the state department accountability review board chaired by admiral mike mullen and thomas pickerring concluded last month, "there simply was not enough time for armed u.s. military assets to have made a difference." that is not what congressman jason chaffetz was told by general carter hamm when they traveled to libya after the attack. >> he told me he had proximity and capability but he was not told to go fight for